John cabroll



' J. CARROLL. STEAM GENERATOR.

No. 105,642. Patented July 26, 1870.

- me norms Psrcns co, Pnomu'mo., wAsHmsTuN. D, c.

Sinatra "rioifoipm 'JouNoARRoLIr oir-DETROIT, MICHIGAN.

4 Letters Patent No. 105,642, dormono/'26, 1ero.

' IMPROVEMENT IN' STEAM-GENERATOR.

The Schedule referred to inthese LettereP-aten't and making parta-.vfthe name.

To whom. it muy concern 'Be it' known that I, JOHN CARROLL, of Detroit,l

in the countyof Wayne and State ol` Michigan, have' invented a new anduseful Improvement in Steam- Generators; and-jdo' declarelthat thefollowing isa true and accurate description thereo-reference.being hadtothe accompanying drawing and to the letters of reference marked thereon,and being apart of this specilication, in which-.- l

Figure 1 isa longitudinal vertical section on the linezxiniigZ.

Figure 2 is a transverse-vertical section on th'e line il .'l in iig..

Like letter-sindicato like parts in each figure.

The nature of this invention relatesv to `an iml proved construction ofsteam-generators, and consists Ain, so'constructing the same that all,or very'uearly all, the productsof combustion ot'thc fuel used ingeneratingsteam are consumed;` .'thatapvery large and increased'heating-surface is obtained -and in .a new, in-

genious, and novel arrangement ol' its variousparts.

YIn the` accompanying drawing, -I represent whatis ordinarily termed allocomotive-boiler, with bori`- zontal fines, and vertical lines in thesmoke-stack.

A represents a fire-box, provided with usual fire'- grates, B, andaslrpit Gand bridgewall D.

E is a s'eri'cs of'tlues, with spaces `between the same,"

upon the grates B,.and whose top enters the smoken chamberJ, whereitterminates in the perfbratedtubes K. The sides of the conical cylinderwithin the firebox are perforated, as shown, for the purpose herein#after explained.

L is a suspended bridge-wall, also hollow, and counected, by means'ofthe pipe M, with the water-space of the boiler.

N is a door or trap, opening from the outsideinto theVcombustriolrohamber F, through which ashes or dirt may be withdrawn; i

O is a perforated pipe, secured at its ends to the sides of thecombustion-chamber, through which it passes directly in front of theupper part of the suspended bridge-wall L, and allows. a passage for airfrom the outside of the boiler into the said combustion-chamber. v

' 1 is a large tine leading from 'said combustion-chamber to thesmoke-box Q. Y It is a series of iiues leading' from said smoke-box tothe'smoke-chamber J.

S is another series oxiiues leading from said smokcf chamber upwardinto-the smohesmck.

land against the current of air which isradmittcd through the perforatedpipe O, 'whence all the proda are water-spaces in the boiler. p

The ues I, Rand S are secured to. and through suitabletube-sheets in theusual manner. Fire being kindled in the fire-box, the ame is broken up,in its passage into the combustiou'lchamf ber F, by passing through thespaces between the reotangular l'lues E, and, upon their entrance'tosaid combustion-chamber, are mingled* with the currents of heated airwhich pass through said dues E from beneath the grates, while the heatarising from said flames is deflected over the top of the delicc'tor Gucts of combustion, ,being throughly mingled with the airadrnitted, asdescribed, are carried, being partially consumed, through the flue P, tothe smoke-box and thence, through the tides R, to the smokechamber J,where they are again brought into contact with flames and heat, whichare carried into said oham- Y ber through the conica] perforatedcylinder I, and distributed through the perforated pipes K,`such Contactproducing a. thorough combustion of the remaining smoke and gases, whilethe heat and the remaining smoke, should there be any, will pass upwardthrough the' tlues S to the smokefstack,

I-do not pretend to be `the,original and first inventor of'an` ignitingcommunication between the irc-A box andthe chamber above it, but only ofthespeciic construct-ion and arrangement shown and described,

wherein the hase of the cylinder-ZI rests. upon' the grates B, and theperforated tube K is connected withl the cylinder I, and arranged withinthe smoke-cham ber J, as shown and described. I

What I claim as my invention, and desire to secure by Letters Patent,is-

1; The cylinder 1, resting upon the grates B, and having connectedtherewith the 'perforated tube K, placed within the smoke-chamber J,when the several parts are constructed -and arranged as described andshown, and as and for the purposes set forth.

2. ,The deliector G, hollow, and connect-ed with the water-space of theboiler by the pipe H, and resting above the lilies E and bridge-wall D,substantially as herein designated.

f `3. The construction of a steam-generator, wherein the grate-bars B,ashfpit O, bridge-wall D, retangular fines E, combustion-chamber F,deiiector G, pipes H M, cylinder I, perforated pipes K, smoke-chambers JQ, suspended bridge-wall L, door or trap N, perforated pipe 0, and linesP R S are arranged, relatively to each other and the water-spaces c ofthe boiler, substantially as and for the purposes herein shown, setforth, and described.

J OHN CARROLL.

Witnesses:

H. FREDERICK EBERTS, SAM. J. SPRAY.

